Zztai Peptide -- Lab Test Results
Independent Certificates of Analysis aggregated from public lab results. Not affiliated with or paid by Zztai Peptide.
35
CoAs on file
99.58%
Avg reported purity
3
Compounds tested
Mar 24, 2026
Latest test
Results by compound
| Compound | CoAs | Avg purity | Latest |
|---|---|---|---|
| Tirzepatide | 20 | 99.58% | Mar 24, 2026 |
| Retatrutide | 11 | 99.47% | Feb 21, 2026 |
| GHK-Cu | 4 | 99.89% | Feb 14, 2026 |
Recent CoAs
| Compound | Batch | Purity | Lab | Tested | |
|---|---|---|---|---|---|
| Tirzepatide | -- | 99.8% | Lab G | Mar 24, 2026 | verify |
| Retatrutide | -- | 99.74% | Lab E | Feb 21, 2026 | verify |
| Retatrutide | -- | 99.5% | Lab G | Feb 14, 2026 | verify |
| GHK-Cu | -- | 99.7% | Lab G | Feb 14, 2026 | verify |
| GHK-Cu | -- | 99.95% | Lab E | Jan 14, 2026 | verify |
| Tirzepatide | -- | 99.95% | Lab E | Jan 8, 2026 | verify |
| Retatrutide | -- | 99.7% | Lab G | Jan 6, 2026 | verify |
| Tirzepatide | -- | 99.7% | Lab G | Jan 6, 2026 | verify |
| GHK-Cu | -- | 99.95% | Lab E | Jan 5, 2026 | verify |
| Tirzepatide | -- | 99.8% | Lab G | Dec 31, 2025 | verify |
| Retatrutide | -- | 99.7% | Lab G | Dec 15, 2025 | verify |
| Tirzepatide | -- | 99.8% | Lab G | Dec 12, 2025 | verify |
| Tirzepatide | -- | 99.7% | Lab G | Dec 12, 2025 | verify |
| GHK-Cu | -- | 99.95% | Lab E | Nov 3, 2025 | verify |
| Tirzepatide | -- | 99.7% | Lab G | Oct 29, 2025 | verify |
| Tirzepatide | -- | 99.7% | Lab G | Oct 23, 2025 | verify |
| Tirzepatide | -- | 99.92% | Lab E | Sep 17, 2025 | verify |
| Tirzepatide | -- | 99.95% | Lab E | Sep 17, 2025 | verify |
| Retatrutide | -- | 99.94% | Lab E | Sep 17, 2025 | verify |
| Retatrutide | -- | 96.63% | Lab E | Sep 3, 2025 | verify |
| Tirzepatide | -- | 98.59% | Lab E | Aug 30, 2025 | verify |
| Tirzepatide | -- | 99.87% | Lab E | Aug 27, 2025 | verify |
| Tirzepatide | -- | 99.07% | Lab E | Aug 27, 2025 | verify |
| Retatrutide | -- | 99.9% | Lab E | Aug 10, 2025 | verify |
| Tirzepatide | -- | 98.35% | Lab E | Aug 4, 2025 | verify |
Showing 25 most recent of 35. Search the full database on the CoA page.
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<a href="https://ascendpeptide.org/coa/vendor/zztai-peptide/" rel="noopener"> <img src="https://ascendpeptide.org/coa/badge/zztai-peptide.svg" alt="Zztai Peptide: lab tested, 35 CoAs on file at ASCEND Peptide" width="230" height="54"> </a>
Data comes from publicly posted third-party lab certificates (Janoshik, MZ Biolabs, and others) and community submissions. Purity figures are as reported by the testing lab for the specific batch tested; they are not a guarantee of any other batch. For research and informational purposes only.